Looks like a whole bunch more folks have joined the #TwitterMigration -- welcome! It's nice here! I'll follow this post by boosting a bunch of advice for newbies. My personal appeals, please:

Use Pascal case in hashtags so screen readers parse them correctly. #ThisIsPascalCase #thisisnotpascalcase

Put alt-text on your pics! (I only boost pics with alt-text, and I know a lot of other folks do too.)

Last: I found Twitter confusing at first too, so don't worry if it takes a bit to get comfy!